The Grabber Hand Warmers 10 Hour Resealable - 3 pk contains 2 revolutionary resealable Grabber Air Lock Warmer Bags to Turn On & Turn Off Grabber Warmers so you can save them for later. Simply place unspent Warmers in the Air Lock Warmer Bag, squeeze the air out, and slide the lock shut. To reactivate a Warmer, simply open the seal and they will heat up naturally again when exposed to oxygen. Use them again and again until the Warmer is spent. Great for walking the dog, shoveling the driveway, on the morning run, bus stops, office, home, car or give it as a warm gift. Grabber Warmers are odorless, long-lasting sources of personal heat that are environmentally friendly.